Atom, Electromagnetism, Rectification
Help!
|
|
||||
|---|---|---|---|---|---|
| Isotope | Atoms that have same proton number but different neutron number.
🗑
|
||||
| Orbital shells range from K through ___. | Q
🗑
|
||||
| Principal quantum number is represented by the letter ___. | N
🗑
|
||||
| The binding energy of an electron is measured in _________. | electron volt (eV)
🗑
|
||||
| The periodic table lists ___ naturally occurring elements and an additional __ elements created in the laboratory. | 92, 18
🗑
|
||||
| The number of electrons in the outermost shell of an atom determines the chemical combining characteristic or _________. | Valence
🗑
|
||||
| A form of energy that is the result of electric and magnetic disturbances in space is called _________. | Electromagnetic energy
🗑
|
||||
| Gamma rays originate from ____________________. | the nucleus of radioactive materials
🗑
|
||||
| One of the most common properties of all forms of electromagnetic radiation is __________. | Velocity
🗑
|
||||
| Electromagnetic radiation with energies of approximately 10 eV and higher are capable of _______________. | Ionizing an atom or molecule
🗑
|
||||
| The dual nature of electromagnetic radiation is called ___________. | Wave-particle duality of radiation
🗑
|
||||
| Electromagnetic waves travel in the form of ____ waves. | Sine
🗑
|
||||
| Wavelength is usually measured from __________ or _______________ | crest-to-crest, trough-to-trough
🗑
|
||||
| Wavelength is represented by the Greek letter ____. | Lambda
🗑
|
||||
| Diagnostic wavelengths are measured in _____. | Angstroms
🗑
|
||||
| The wavelength of diagnostic x-rays is _____. | 0.1 - 0.5 Angstroms
🗑
|
||||
| The intensity of wave defined by maximal height is called _________. | Amplitude
🗑
|
||||
| The number of waves that passes a particular point in a given time frame or number of cycles per second is called __________. | Frequency
🗑
|
||||
| The time required to complete one cycle of the wave is called ___________. | Period
🗑
|
||||
| Frequency and wavelength are _____________ proportional. | Inversely
🗑
|
||||
| Electromagnetic radiation acts like a small bundle of energy, called a _________ or _________. | Photon, Quantum
🗑
|
||||
| Photon energy and frequency are ____________ proportional. | Directly
🗑
|
||||
| The study of the distribution of fixed charges or electrons at rest is called __________. | Electrostatics
🗑
|
||||
| The process of electron charges being added or subtracted from an object is called _________. | Electrification
🗑
|
||||
| __________________ are materials that inhibit the flow of electrons. | Insulators
🗑
|
||||
| ______________ have the ability to conduct under certain conditions and insulate under others. | Semi-conductors
🗑
|
||||
| Electrons move from the _________ concentration to the __________ concentration. | Highest, lowest
🗑
|
||||
| Conventional electric current is described as going from __________ to ________ poles, while electron flow is actually from ____ to ____ poles. | Positive, negative, negative, positive
🗑
|
||||
| ________ refers to the quantity or number of electrons flowing. | Current
🗑
|
||||
| The unit of current is called _______. | Amp
🗑
|
||||
| X-ray equipment uses __________ units to regulate the number of electrons available to produce x-ray photons. | milliamperage
🗑
|
||||
| The force or strength of electron flow is called ___________. | Potential difference
🗑
|
||||
| The total maximum difference of potential between the positive and negative ends of the electron source is called _________. | Electromotive force
🗑
|
||||
| The unit of potential difference is called ____. | Volt
🗑
|
||||
| The unit of resistance is called the ______. | OHM
🗑
|
||||
| What is another name for variable resistor? | Rheostat
🗑
|
||||
| The force fields that are created when magnetic dipoles orient to create a magnet are called _____________. | Lines of force or magnetic field
🗑
|
||||
| Lines of force always flow ________ to ________ outside a magnet and ________ to _______ within a magnet. | North, South; South, North
🗑
|
||||
| Direct-current motors use _________ rings. | commutator
🗑
|
||||
| Alternating-current motors use __________ rings. | slip
🗑
|
||||
| __________ motors are used in rotating anode x-ray tubes. | Induction
🗑
|
||||
| Galvanometers use _________ current. | direct
🗑
|
||||
| Dynamometers use __________ current. | alternating
🗑
|
||||
| Whn a meter is connected in series, the current is measured with a(n) ___________. | ammeter
🗑
|
||||
| When a meter is connected in parallel, the potential difference is measured with a(n) ________. | voltmeter
🗑
|
||||
| When voltage is increased from primary to secondary, it is called a ___________ ______________. | step-up transformer
🗑
|
||||
| When voltage is decreased from primary to secondary, it is called a ______________________________________ | step-down transformer
🗑
|
||||
| All transformers must operate on __________ current. | alternating
🗑
|
||||
| ______ __________ (copper loss) is caused by inherent resistance to current flow that is found in all conductors. | I2R loss
🗑
|
||||
| __________ ____________ (lagging loss) occurs when energy is expended as continually changing AC current magnetizes. | Hysteresis loss
🗑
|
||||
| ________ __________ _____________ is a result of currents opposing |
🗑
|
||||
| The process by which alternating current is changed to pulsating direct current is called ______. | Rectification
🗑
|
||||
| A rectifying semiconductor created by sandwiching a p-type crystal with an n-type to form a p-n junction is called a _______. | Diode
🗑
|
||||
| __-type materials have loosely bound electrons that move freely between an atom's conduction bands. | N
🗑
|
||||
| __-type materials have electron traps made up of positively charged holes that tend to attract and hold electrons instead of permitting free movement to another atom. | P
🗑
|
||||
| In a diode, electrons flow from the ___ to the ___ side of the p-n junction. | N, P
🗑
|
||||
| Conventional electrical current moves from the ___ to the ___ side. | P, N
🗑
|
||||
| Electron flow will always be from ____ to ____, which means conventional electrical current will always be from ____ to ______. | Cathode, anode; anode, cathode
🗑
|
||||
| Self rectification was replaced by _________ rectification. | Half-wave
🗑
|
||||
| A device that converts mechanical energy to electrical energy by electromagnetic induction is called a(n) ___________. | Electric generator
🗑
|
||||
| There are _____ alternations per second with a 60-cycle current. | 120
🗑
|
||||
| A device that converts electrical energy to mechanical energy is called a(n) _________. | Electric motor
🗑
|
||||
| An electromagnetic device that changes alternating current from low voltage to high voltage or vice versa is called a(n) ________. | Transformer
🗑
|
||||
| This electromagnetic device employs the principle of _______________________ induction. | electromagnetic mutual
🗑
|
||||
| An electromagnetic device operating on the principle of self-inductance is called a(n) ___________. | Choke coil
🗑
|
||||
| Rectification systems are connected between the secondary side of the _____________ and the _____________. | X-ray transformer, x-ray tube
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
rad1958tech